Replaceable knife and jaw for pliers



C. OREARDON. REPLACEABLE KNIFE AND .IAW FOR PLIERS.

gnxantoz APPLICATION FILED MAR-8,1920.

Patented Apr. 25

Charles OReafdqn.

' CHARLES o'nnaanon, or onxnnnnicanrroanm.

REPLACEABLE KNIFE AND JAW FOR PLIERS.

Specification of Letters Patent. Patented Ap1', 25, 1922.

Application filed March 8, 1920. Serial No. 364,080.

T 0 all whom it may concern:

Be it known that 1. CHARLES ORnARnoN, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Replaceable Knives and J aws for Pliers, of which the following is a specification. In use, the cutting edge of pliers becomes nicked and worn'to such an extent that they become useless, necessitating a new pair.

The object of my invention therefore is to provide for the replacement of the worn parts, thus prolonging the usefulness of the pliers. The present invention is an improvement on my invention shown in Patent No. 1276256, issued August 20, 1918.

Figure 1 is a side elevation of my improved pliers. Fig. 2 is a sectional view taken on the line 22 of Fig. 1. Fig. 8 is a sectional view taken on the line 3-3 of Fig. 1. Fig, 4 is a perspective view of the cutting knife. Fig. 5 is a side elevation a modified form of pliers. Fig. 6 is a sectional view taken on the line 66 of Fig. 5. Fig. 7 is a perspective view of one of the plier jaws, embodying another modification of my invention with the knife and gripping jaw removed. Fig. 8 is a perspective view of one of the replaceable gripping jaws.

Referring in detail to the drawings, '1 denotes a pair of pliers having gripping jaws 2 and. 3, which are respectively provided" with shanks I} and 5 pivoted together in the usual manner by a bolt 6. The jaws 2 and 3 of the pliers are of the usual construction but have their opposing surfaces formed at a portion adjacent the bolt 6 and remote from their extremities, with recesses 7 and S into which are fitted knives 10 and 9, respectively. The extremities of the opposing faces of the aws may be formed, as shown in Figs. 5. 6 and 7, with recesses 17 and 18,

respectively, which removably receive plates 16 and 15. These plates are corrugated or roughened on their opposite sides in order that they may be turned and reversed in the recesses as the corrugations wear from use. The plates 15 and 16 are held in position by suitable screws 19 and 20 which pass therethrough and are each threadably engaged in an opening in the jaw, as clearly shown.

The knives 9 and 10 consist of plates having opposing cutting edges, each plate being provided with a recess or cutaway portion thus providing the shoulders 14 and 13 on the plates respectively. These shoulders engage the inner edges of the recesses 8 and 9, respectively, while the plates are fitted in correspondlng recesses on the sides of the jaws and are removably held in position by .pliers having removable gripping plates and independently removable knives, the form shown in Fig. 7 embodying both of these features, and possessing such construction and arrangement of parts as economically provides for a durable tool having independently and readily removable parts.

' Having described m invention, I claim:

1. Pliers comprising a pair of pivotally connected gripping jaws having a recess in each of their opposing faces adjacent the free extremity thereof, fiat gripping plates removably inserted in said recesses, other'recesses formed in the opposing faces of said jaws at a point remote from their extremities and adjacent their point of pivot, plates removably inserted insaid last-mentioned recesses'and having cuttin edges arranged an opposed relat1on,:and means for remov ably maintaining said last-mentioned plates in their respective recesses. 1 a

2. In combination with a pair of pliers having jaws, each provided with a recess in the end of its gripping surface and each= further provided with a recess 1n. said surface inwardly of said first-mentioned recess, aside surface of each aw also having a recess adjacent said inner recess, a gripping-plate for each jaw having a roughened surface,

said plates being removably received in the recesses in the ends of the opposing surfaces .of the jaws, and means for securing said gripping plates in said recessesa detachable knife for each aw, each ofsaid knives comprising a plate having a rabbet in one edge thereof, and a cutting edge formed on the opposite edge of said plate, one Wall formed by the rabbet in said plate engaging in the recess in the side of the jaw and the other wall of the rabbet engaging in the inner recess in the opposing face f the jaw, whereby the cutting edges are brought together when the jaws are closed, and a fastening element extending through said knife plate.

In testimony whereof I affix my signature.

CHARLES OREARDQN- 

